Then see how many cursors and triggers you can add before SC gives up or misbehaves. I think you’ll find IanniX hangs on the send and display side before SC stops handling traffic. Yes, you will hit trouble if you try to instantiate a thousand UGens at once. Is that a limitation of SC, or of your hardware config?
The biggest problem with your patch is the comb you have echoing each new note. I couldn’t figure out what you intend the relation between the echoes and the pace of triggers to be. I believe that fixing your note/frequency selection logic and removing the comb will make your patch perfectly well-behaved.